Engadget - We're still waiting for the Comcast Xfinity TV app to appear on our Xbox 360 dashboards, but word is its beta tests have expanded to cover more Microsoft and Comcast employees, and it could launch as soon as the next week or so. In case you're wonder exactly what its capabilities will be when it will arrives, a post over at AVSForum points out a support page that's already live and details both the requirements for service and content available.